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mpv/libmpdemux/demux_real.c

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/*
Real parser & demuxer
(C) Alex Beregszaszi <alex@naxine.org>
Based on FFmpeg's libav/rm.c.
$Log$
Revision 1.6 2002/01/04 19:32:58 alex
updated/extended some parts, based on RMFF (also initial ATRAC3 hackings and notes)
Audio codecs: (supported by RealPlayer8 for Linux)
ATRC - RealAudio 8 (ATRAC3) - www.minidisc.org/atrac3_article.pdf,
ACM decoder uploaded, needs some fine-tuning to work
COOK/COKR - RealAudio G2
DNET - RealAudio 3.0
SIPR - SiproLab's audio codec, ACELP decoder working with MPlayer,
needs fine-tuning too :)
Video codecs: (supported by RealPlayer8 for Linux)
RV10 - H.263 based, working with libavcodec's decoder
RV20
RV30
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "bswap.h"
#define MKTAG(a, b, c, d) (a | (b << 8) | (c << 16) | (d << 24))
#define MAX_STREAMS 10
typedef struct {
int timestamp;
int offset;
int packetno;
} real_index_table_t;
typedef struct {
/* for seeking */
int index_chunk_offset;
real_index_table_t *index_table[MAX_STREAMS];
// int *index_table[MAX_STREAMS];
int index_table_size[MAX_STREAMS];
int data_chunk_offset;
int num_of_packets;
int current_packet;
/* stream id table */
int last_a_stream;
int a_streams[MAX_STREAMS];
int last_v_stream;
int v_streams[MAX_STREAMS];
} real_priv_t;
/* originally from FFmpeg */
static void get_str(int isbyte, demuxer_t *demuxer, char *buf, int buf_size)
{
int len;
if (isbyte)
len = stream_read_char(demuxer->stream);
else
len = stream_read_word(demuxer->stream);
stream_read(demuxer->stream, buf, (len > buf_size) ? buf_size : len);
if (len > buf_size)
stream_skip(demuxer->stream, len-buf_size);
printf("read_str: %d bytes read\n", len);
}
static void skip_str(int isbyte, demuxer_t *demuxer)
{
int len;
if (isbyte)
len = stream_read_char(demuxer->stream);
else
len = stream_read_word(demuxer->stream);
stream_skip(demuxer->stream, len);
printf("skip_str: %d bytes skipped\n", len);
}
static void parse_index_chunk(demuxer_t *demuxer)
{
real_priv_t *priv = demuxer->priv;
int origpos = stream_tell(demuxer->stream);
int next_header_pos = priv->index_chunk_offset;
int i, entries, stream_id;
read_index:
stream_seek(demuxer->stream, next_header_pos);
i = stream_read_dword_le(demuxer->stream);
if ((i == -256) || (i != MKTAG('I', 'N', 'D', 'X')))
{
printf("Something went wrong, no index chunk found on given address (%d)\n",
next_header_pos);
goto end;
}
printf("Reading index table from index chunk (%d)\n",
next_header_pos);
i = stream_read_dword(demuxer->stream);
printf("size: %d bytes\n", i);
i = stream_read_word(demuxer->stream);
if (i != 0)
printf("Hmm, index table with unknown version (%d), please report it to MPlayer developers!\n", i);
entries = stream_read_dword(demuxer->stream);
printf("entries: %d\n", entries);
stream_id = stream_read_word(demuxer->stream);
printf("stream_id: %d\n", stream_id);
next_header_pos = stream_read_dword(demuxer->stream);
printf("next_header_pos: %d\n", next_header_pos);
if (entries <= 0)
{
if (next_header_pos)
goto read_index;
i = entries;
goto end;
}
priv->index_table_size[stream_id] = entries;
priv->index_table[stream_id] = malloc(priv->index_table_size[stream_id] * sizeof(real_index_table_t));
for (i = 0; i < entries; i++)
{
stream_skip(demuxer->stream, 2); /* version */
priv->index_table[stream_id][i].timestamp = stream_read_dword(demuxer->stream);
priv->index_table[stream_id][i].offset = stream_read_dword(demuxer->stream);
priv->index_table[stream_id][i].packetno = stream_read_dword(demuxer->stream);
printf("Index table: Stream#%d: entry: %d: pos: %d\n",
stream_id, i, priv->index_table[stream_id][i].offset);
}
demuxer->seekable = 1; /* got index, we're able to seek */
if (next_header_pos > 0)
goto read_index;
printf("End of index tables\n");
end:
if (i == -256)
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, origpos);
}
int real_check_file(demuxer_t* demuxer)
{
real_priv_t *priv;
int c;
mp_msg(MSGT_DEMUX,MSGL_V,"Checking for REAL\n");
c = stream_read_dword_le(demuxer->stream);
if (c == -256)
return 0; /* EOF */
if (c != MKTAG('.', 'R', 'M', 'F'))
return 0; /* bad magic */
priv = malloc(sizeof(real_priv_t));
memset(priv, 0, sizeof(real_priv_t));
demuxer->priv = priv;
return 1;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_real_fill_buffer(demuxer_t *demuxer)
{
real_priv_t *priv = demuxer->priv;
demux_stream_t *ds = NULL;
int len;
int timestamp;
int stream_id;
int i;
int flags;
// printf("num_of_packets: %d\n", priv->num_of_packets);
loop:
if ((priv->num_of_packets == 0) && (priv->num_of_packets != -10))
return 0; /* EOF */
if (priv->current_packet > priv->num_of_packets)
return 0; /* EOF */
stream_skip(demuxer->stream, 2); /* version */
len = stream_read_word(demuxer->stream);
if (len == -256) /* EOF */
return 0;
if (len < 12)
{
printf("bad packet len (%d)\n", len);
stream_skip(demuxer->stream, len);
goto loop;
}
stream_id = stream_read_word(demuxer->stream);
timestamp = stream_read_dword(demuxer->stream);
stream_skip(demuxer->stream, 1); /* reserved */
flags = stream_read_char(demuxer->stream);
/* flags: */
/* 0x1 - reliable */
/* 0x2 - keyframe */
// printf("packet#%d: pos: %d, len: %d, stream_id: %d, timestamp: %d, flags: %x\n",
// priv->current_packet, stream_tell(demuxer->stream)-12, len, stream_id, timestamp, flags);
// if (priv->num_of_packets != -10)
// priv->num_of_packets--;
priv->current_packet++;
len -= 12;
/* check if stream_id is audio stream */
for (i = 0; i < priv->last_a_stream; i++)
{
if (priv->a_streams[i] == stream_id)
{
// printf("packet is audio (id: %d)\n", stream_id);
ds = demuxer->audio; /* FIXME */
break;
}
}
/* check if stream_id is video stream */
for (i = 0; i < priv->last_v_stream; i++)
{
if (priv->v_streams[i] == stream_id)
{
// printf("packet is video (id: %d)\n", stream_id);
ds = demuxer->video; /* FIXME */
break;
}
}
/* id not found */
if (ds == NULL)
{
printf("unknown stream id (%d)\n", stream_id);
stream_skip(demuxer->stream, len);
goto loop;
}
demuxer->filepos = stream_tell(demuxer->stream);
ds_read_packet(ds, demuxer->stream, len, timestamp/90000.0f,
demuxer->filepos, (flags & 0x2) ? 0x10 : 0);
return 1;
}
void demux_open_real(demuxer_t* demuxer)
{
real_priv_t* priv = demuxer->priv;
int num_of_headers;
int i;
stream_skip(demuxer->stream, 4); /* header size */
stream_skip(demuxer->stream, 2); /* version */
// stream_skip(demuxer->stream, 4);
i = stream_read_dword(demuxer->stream);
printf("File version: %d\n", i);
num_of_headers = stream_read_dword(demuxer->stream);
// stream_skip(demuxer->stream, 4); /* number of headers */
/* parse chunks */
for (i = 1; i < num_of_headers; i++)
{
int chunk, chunk_size;
chunk = stream_read_dword_le(demuxer->stream);
chunk_size = stream_read_dword(demuxer->stream);
stream_skip(demuxer->stream, 2); /* version */
if (chunk_size < 10)
goto fail;
printf("Chunk: %.4s (size: %d)\n",
(char *)&chunk, chunk_size);
switch(chunk)
{
case MKTAG('P', 'R', 'O', 'P'):
/* Properties header */
stream_skip(demuxer->stream, 4); /* max bitrate */
stream_skip(demuxer->stream, 4); /* avg bitrate */
stream_skip(demuxer->stream, 4); /* max packet size */
stream_skip(demuxer->stream, 4); /* avg packet size */
stream_skip(demuxer->stream, 4); /* nb packets */
stream_skip(demuxer->stream, 4); /* duration */
stream_skip(demuxer->stream, 4); /* preroll */
priv->index_chunk_offset = stream_read_dword(demuxer->stream);
printf("First index chunk offset: 0x%x\n", priv->index_chunk_offset);
priv->data_chunk_offset = stream_read_dword(demuxer->stream)+10;
printf("First data chunk offset: 0x%x\n", priv->data_chunk_offset);
stream_skip(demuxer->stream, 2); /* nb streams */
#if 0
stream_skip(demuxer->stream, 2); /* flags */
#else
{
int flags = stream_read_word(demuxer->stream);
printf("Flags (%x): ", flags);
if (flags & 0x1)
printf("[save allowed] ");
if (flags & 0x2)
printf("[perfect play (more buffers)] ");
if (flags & 0x4)
printf("[live broadcast] ");
printf("\n");
}
#endif
break;
case MKTAG('C', 'O', 'N', 'T'):
{
/* Content description header */
char *buf;
int len;
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
demux_info_add(demuxer, "name", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "author", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "copyright", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "comment", buf);
free(buf);
}
break;
}
case MKTAG('M', 'D', 'P', 'R'):
{
/* Media properties header */
int stream_id;
int bitrate;
int codec_data_size;
int codec_pos;
int tmp;
stream_id = stream_read_word(demuxer->stream);
printf("Found new stream (id: %d)\n", stream_id);
stream_skip(demuxer->stream, 4); /* max bitrate */
bitrate = stream_read_dword(demuxer->stream); /* avg bitrate */
stream_skip(demuxer->stream, 4); /* max packet size */
stream_skip(demuxer->stream, 4); /* avg packet size */
stream_skip(demuxer->stream, 4); /* start time */
stream_skip(demuxer->stream, 4); /* preroll */
stream_skip(demuxer->stream, 4); /* duration */
skip_str(1, demuxer); /* stream description (name) */
skip_str(1, demuxer); /* mimetype */
/* Type specific header */
codec_data_size = stream_read_dword(demuxer->stream);
codec_pos = stream_tell(demuxer->stream);
tmp = stream_read_dword(demuxer->stream);
if (tmp == MKTAG(0xfd, 'a', 'r', '.'))
{
/* audio header */
sh_audio_t *sh = new_sh_audio(demuxer, stream_id);
char buf[128]; /* for codec name */
int frame_size;
int version;
printf("Found audio stream!\n");
version = stream_read_word(demuxer->stream);
printf("version: %d\n", version);
// stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 2);
stream_skip(demuxer->stream, 4); /* .ra4 or .ra5 */
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 4); /* header size */
stream_skip(demuxer->stream, 2); /* add codec info */
stream_skip(demuxer->stream, 4); /* coded frame size */
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2); /* 1 */
// stream_skip(demuxer->stream, 2); /* coded frame size */
frame_size = stream_read_word(demuxer->stream);
printf("frame_size: %d\n", frame_size);
stream_skip(demuxer->stream, 4);
if (version == 5)
stream_skip(demuxer->stream, 6);
sh->samplerate = stream_read_word(demuxer->stream);
stream_skip(demuxer->stream, 4);
sh->channels = stream_read_word(demuxer->stream);
printf("samplerate: %d, channels: %d\n",
sh->samplerate, sh->channels);
if (version == 5)
{
stream_skip(demuxer->stream, 4);
stream_read(demuxer->stream, buf, 4);
buf[4] = 0;
}
else
{
/* Desc #1 */
skip_str(1, demuxer);
/* Desc #2 */
get_str(1, demuxer, buf, sizeof(buf));
}
/* Emulate WAVEFORMATEX struct: */
sh->wf = malloc(sizeof(WAVEFORMATEX));
memset(sh->wf, 0, sizeof(WAVEFORMATEX));
sh->wf->nChannels = sh->channels;
sh->wf->wBitsPerSample = 16;
sh->wf->nSamplesPerSec = sh->samplerate;
sh->wf->nAvgBytesPerSec = bitrate;
sh->wf->nBlockAlign = frame_size;
sh->wf->cbSize = 0;
tmp = 1; /* supported audio codec */
switch (MKTAG(buf[0], buf[1], buf[2], buf[3]))
{
case MKTAG('d', 'n', 'e', 't'):
printf("Audio: DNET -> AC3\n");
sh->format = 0x2000;
break;
case MKTAG('s', 'i', 'p', 'r'):
printf("Audio: SiproLab's ACELP.net\n");
sh->format = 0x130;
/* for buggy directshow loader */
sh->wf = realloc(sh->wf, 18+4);
sh->wf->wBitsPerSample = 0;
sh->wf->nAvgBytesPerSec = 1055;
sh->wf->nBlockAlign = 19;
// sh->wf->nBlockAlign = frame_size / 288;
sh->wf->cbSize = 4;
buf[0] = 30;
buf[1] = 1;
buf[2] = 1;
buf[3] = 0;
memcpy((sh->wf+18), (char *)&buf[0], 4);
// sh->wf[sizeof(WAVEFORMATEX)+1] = 30;
// sh->wf[sizeof(WAVEFORMATEX)+2] = 1;
// sh->wf[sizeof(WAVEFORMATEX)+3] = 1;
// sh->wf[sizeof(WAVEFORMATEX)+4] = 0;
break;
case MKTAG('c', 'o', 'o', 'k'):
printf("Audio: Real's GeneralCooker (?) (RealAudio G2?) (unsupported)\n");
tmp = 0;
break;
case MKTAG('a', 't', 'r', 'c'):
printf("Audio: ATRAC3 (RealAudio 8?) (unsupported)\n");
sh->format = 0x270;
break;
default:
printf("Audio: Unknown (%s)\n", buf);
tmp = 0;
sh->format = MKTAG(buf[0], buf[1], buf[2], buf[3]);
}
sh->wf->wFormatTag = sh->format;
print_wave_header(sh->wf);
if (tmp)
{
/* insert as stream */
demuxer->audio->sh = sh;
sh->ds = demuxer->audio;
demuxer->audio->id = stream_id;
if (priv->last_a_stream+1 < MAX_STREAMS)
{
priv->a_streams[priv->last_a_stream] = stream_id;
priv->last_a_stream++;
}
}
else
free(sh->wf);
// break;
}
else
// case MKTAG('V', 'I', 'D', 'O'):
{
/* video header */
sh_video_t *sh = new_sh_video(demuxer, stream_id);
tmp = stream_read_dword_le(demuxer->stream);
printf("video: %.4s (%x)\n", (char *)&tmp, tmp);
if (tmp != MKTAG('V', 'I', 'D', 'O'))
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "Not audio/video stream or unsupported!\n");
goto skip_this_chunk;
}
sh->format = stream_read_dword_le(demuxer->stream); /* fourcc */
printf("video fourcc: %.4s (%x)\n", (char *)&sh->format, sh->format);
/* emulate BITMAPINFOHEADER */
sh->bih = malloc(sizeof(BITMAPINFOHEADER));
memset(sh->bih, 0, sizeof(BITMAPINFOHEADER));
sh->bih->biSize = 40;
sh->disp_w = sh->bih->biWidth = stream_read_word(demuxer->stream);
sh->disp_h = sh->bih->biHeight = stream_read_word(demuxer->stream);
sh->bih->biPlanes = 1;
sh->bih->biBitCount = 24;
sh->bih->biCompression = sh->format;
sh->bih->biSizeImage= sh->bih->biWidth*sh->bih->biHeight*3;
sh->fps = stream_read_word(demuxer->stream);
sh->frametime = 1.0f/sh->fps;
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2);
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2);
/* h263 hack */
tmp = stream_read_dword(demuxer->stream);
printf("H.263 ID: %x\n", tmp);
switch (tmp)
{
case 0x10000000:
/* sub id: 0 */
/* codec id: rv10 */
break;
case 0x10003000:
case 0x10003001:
/* sub id: 3 */
/* codec id: rv10 */
sh->bih->biCompression = sh->format = mmioFOURCC('R', 'V', '1', '3');
break;
case 0x20001000:
case 0x20100001:
/* codec id: rv20 */
break;
default:
/* codec id: none */
printf("unknown id: %x\n", tmp);
}
/* insert as stream */
demuxer->video->sh = sh;
sh->ds = demuxer->video;
demuxer->video->id = stream_id;
if (priv->last_v_stream+1 < MAX_STREAMS)
{
priv->v_streams[priv->last_v_stream] = stream_id;
priv->last_v_stream++;
}
}
// break;
// default:
skip_this_chunk:
/* skip codec info */
tmp = stream_tell(demuxer->stream) - codec_pos;
stream_skip(demuxer->stream, codec_data_size - tmp);
break;
// }
}
case MKTAG('D', 'A', 'T', 'A'):
goto header_end;
case MKTAG('I', 'N', 'D', 'X'):
default:
printf("Unknown chunk: %x\n", chunk);
stream_skip(demuxer->stream, chunk_size - 10);
break;
}
}
header_end:
priv->num_of_packets = stream_read_dword(demuxer->stream);
// stream_skip(demuxer->stream, 4); /* number of packets */
stream_skip(demuxer->stream, 4); /* next data header */
printf("Packets in file: %d\n", priv->num_of_packets);
if (priv->num_of_packets == 0)
priv->num_of_packets = -10;
/* disable seeking */
demuxer->seekable = 0;
if (priv->index_chunk_offset && ((index_mode == 1) || (index_mode == 2)))
parse_index_chunk(demuxer);
fail:
return;
}
void demux_close_real(demuxer_t *demuxer)
{
real_priv_t* priv = demuxer->priv;
if (priv)
free(priv);
return;
}
#if 0
/* will complete it later - please upload RV10 samples WITH INDEX CHUNK */
int demux_seek_real(demuxer_t *demuxer, float rel_seek_secs, int flags)
{
real_priv_t *priv = demuxer->priv;
demux_stream_t *d_audio = demuxer->audio;
demux_stream_t *d_video = demuxer->video;
sh_audio_t *sh_audio = d_audio->sh;
sh_video_t *sh_video = d_video->sh;
int rel_seek_frames = sh->fps*rel_seek_secs;
int video_chunk_pos = d_video->pos;
int stream_id = 0;
#if 0
if (flags & 1)
/* seek absolute */
video_chunk_pos = 0;
if (flags & 2)
{
int total = sh_video->video.dwLength;
rel_seek_frames
}
#endif
if (rel_seek_frames > 0)
{
/* seek forward */
for (i = 0; i < index_table_size[stream_id]; i++)
{
if (index_table[stream_id][i]
}
}
}
#endif
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